"Ultimate Mystery... on the Shore (Resort Last Resort)" is the ninth episode of the second season of the anime series Love, Chunibyo and Other Delusions. It was broadcast in Japan on March 5, 2014.

Synopsis

Yuuta Togashi finds an old envelope containing an arcade token similar to the one Satone Shichimiya gave her during the class trip. The next day, Kumin Tsuyuri invites Yuuta and the others to the beach to help out at her aunt's beach house. There, they are visited by Tōka Takanashi, who brings her head chef's daughter, Cento, with her.

Later that night, as Tōka has a chat with Yuuta, Satone notices that Rikka Takanashi is slowly losing her delusional powers, telling her to decide if she is willing to give up her feelings for Yuuta to restore her other persona.

The next day, as Rikka and Satone do battle against each other, Rikka recalls her 'special contract' with Yuuta and decides to believe in the her that he believes in, giving birth to new delusional powers. Afterward, Rikka states her determination to be Yuuta's girlfriend and still retain her Wicked Eye.

On the way home, Satone laments over what could've been if she hadn't chosen to give up her feelings for Yuuta to retain her chuunibyou self, suddenly finding herself overcome with strange thoughts about him.